导入

#import <CallKit/CXCallObserver.h>
#import <CallKit/CXCall.h>

设置电话代理

-(void)setCallObseaver{
    
    if (@available(iOS 10.0, *)) {
        self.callObserver = [CXCallObserver new];
        [self.callObserver setDelegate:self queue:dispatch_get_main_queue()];
    } else {
        // Fallback on earlier versions
    }
   
}

回调

//MARK: CXCallObserverDelegate
- (void)callObserver:(CXCallObserver *)callObserver callChanged:(CXCall *)call  API_AVAILABLE(ios(10.0)){

    NSLog(@"outgoing :%d  onHold :%d   hasConnected :%d   hasEnded :%d",call.outgoing,call.onHold,call.hasConnected,call.hasEnded);
    NSInteger outgoing = call.outgoing;
    NSInteger onHold = call.onHold;
    NSInteger hasConnected = call.hasConnected;
    NSInteger hasEnded = call.hasEnded;
    
    /*
     拨打:  outgoing :1  onHold :0   hasConnected :0   hasEnded :0
     拒绝:  outgoing :0  onHold :0   hasConnected :0   hasEnded :1
     链接:  outgoing :1  onHold :0   hasConnected :1   hasEnded :0
     挂断:  outgoing :1  onHold :0   hasConnected :0   hasEnded :1
     对方未接听时挂断：  outgoing :1  onHold :0   hasConnected :0   hasEnded :1
     
     新来电话:    outgoing :0  onHold :0   hasConnected :0   hasEnded :0
     保留并接听:  outgoing :1  onHold :1   hasConnected :1   hasEnded :0
     另一个挂掉:  outgoing :0  onHold :0   hasConnected :1   hasEnded :0
     保持链接:    outgoing :1  onHold :0   hasConnected :1   hasEnded :1
     对方挂掉:    outgoing :0  onHold :0   hasConnected :1   hasEnded :1
    */
    BOOL isOutCall = NO;
    
    if (outgoing == 0 && hasEnded && onHold==0 && hasConnected ==0) {
        DLog(@"----拒绝");
        isOutCall = YES;
        
    }else if (outgoing && onHold==0 && hasConnected == 0 && hasEnded){
        DLog(@"----挂断");
        isOutCall = YES;
        
    }else if (hasConnected && outgoing == 0 && onHold == 0 && hasEnded == 0){
        DLog(@"----另一个挂掉");
        isOutCall = YES;
        
    }else if (hasConnected && outgoing == 0 && onHold == 0 && hasEnded){
        DLog(@"----对方挂掉 ");
        isOutCall = YES;
    }
    
    if (isOutCall) {
      //操作
    }
}

移除电话监听

        if (_callObserver) {
             [_callObserver setDelegate:nil queue:dispatch_get_main_queue()];
            _callObserver = nil;
        }